HARRY JOSH

Penélope Cruz and Sophia Loren “Two exotic bombshells that Americans just can't get enough of. For their hair, it's all about volume.” Harry's tip:Achieve bombshell hair with Harry Josh Dryer and John Frieda Luxurious Volume Fine to Full Blow Out Spray.

RENATO CAMPORA

Jessica Chastain and Veronica Lake “The sideswept look is as universally flattering and as elegant today on Jessica as it was when Veronica walked the red carpet.” Renato's tip:Achieve elegant volume with John Frieda Luxurious Volume Building Mousse and hold the side sweep with L'Oréal Elnett Satin Hairspray.

Left, from the Everett Collection; right, by Jason Merritt/Getty Images.